Job Description

We are seeking a highly experienced Senior System Administrator to support and evolve our hybrid on‑premises and cloud infrastructure in a Geneva‑based, international environment. This role requires strong expertise in Microsoft technologies, Azure, identity and security services, and virtualization, with a high standard of reliability and professionalism.

The position plays a critical role in ensuring availability, security, and compliance of core IT services supporting business‑critical operations.

Key Responsibilities

• Design, implement, and maintain Windows Server environments (on‑premises and cloud)
• Administer and optimize Microsoft Azure infrastructure and services
• Manage and support Microsoft 365 / Office 365, including Exchange Online and collaboration services
• Administer Microsoft Entra ID (Azure AD), including hybrid identity, synchronization, conditional access, and authentication po...